On the relationship between the urban parameters Sky View Factor, Normalized Difference Vegetation Index and Vegetation Fraction and the Land Surface Temperature derived by Landsat-8 in Bari, Italy

Abstract

This study focuses on the impact of landscape composition and urban morphology on the Land Surface Temperature (LST) in the
city of Bari, Italy. For this aim, correlations between the LST and Sky view factor (SVF), Normalized Difference Vegetation Index
(NDVI) and Vegetation Fraction (Pv) have been done. To do this, several daytime Landsat 8 images acquired in different months of
the year have been used to retrieve LST by using the radiative transfer equation (RTE). The results show a daytime positive
relationship between LST and SVF and this trend is emphasized particularly in the more dense urban areas; normalizing the LST it
appears clearly how these correlations are not affected by seasonal effects. The relationships between NDVI, Pv and LST highlight
the role of vegetation, which is related to the temperature according to an inversely proportional linear function.